So it's okay to drive and text?

Laws banning texting while driving actually may prompt a slight increase in road crashes, research shows. Man bites dog.

"Texting bans haven't reduced crashes at all," says Adrian Lund, president of the Insurance Institute for Highway Safety, whose research arm studied the effectiveness of the laws.

Researchers at the Highway Loss Data Institute compared rates of collision insurance claims in four states — California, Louisiana, Minnesota and Washington — before and after they enacted texting bans. Crash rates rose in three of the states after bans were enacted.

The Highway Loss group theorizes that drivers try to evade police by lowering their phones when texting, increasing the risk by taking their eyes even further from the road and for a longer time.

There's some debate about this.

Lund: The findings "call into question the way policymakers are trying to address the problem of distracted-driving crashes," Lund says, calling for a strategy that goes beyond cellphones to hit other behaviors such as eating and putting on makeup. "They're focusing on a single manifestation of distracted driving and banning it," he says.

Transportation Secretary Ray LaHood: "Between 2005 and 2008, distracted driving-related fatalities jumped from 10% to 16% of all traffic fatalities," he says. "In 2009, for the first time in four years, distracted driving fatalities stopped rising, remaining at 16%. ... Tough laws are the first step and enforcement must be next. We know that anti-distracted-driving laws can be enforced effectively."

Here's a number to keep you from going crazy in the car: Last year 5,474 people were killed and another 448,000 injured in crashes involving distracted driving, defined as operating a vehicle in a careless or inattentive manner, the government says.

Keep this in mind: The National Highway Traffic Safety Administration says just a fraction of the 5,474 people killed and 448,000 injured in crashes involving distracted driving last year involved cellphones: 18% of the fatalities and 5% of the injuries. That means that most distracted driving crashes involved some other behavior.